Specimen ID | State | County | Locality | Year |
| Drainage name | Status |
35129
| MD | | Potomac (HUC6) non-specific | 1980 |
02070000
| Potomac | established |
35130
| MD | | Upper Chesapeake (HUC6) non-specific | 1980 |
02060000
| Upper Chesapeake | established |
268194
| MD | | Upper Chesapeake (HUC6) non-specific | 1981 |
02060000
| Upper Chesapeake | established |
1406171
| MD | Cecil | Mill Creek, tributary of Chesapeake Bay, 1.4 mi NE of Susquehanna River, town of Perryville at US Hwy 40. | 1977 |
02060002
| Chester-Sassafras | established |
613260
| MD | Frederick | Monocacy River, Thurmont, Md. | 1998 |
02070009
| Monocacy | established |
613265
| MD | Frederick | Monocacy River. | 1998 |
02070009
| Monocacy | established |
1670668
| MD | Harford | [No locality description provided] | 2014 |
02060003
| Gunpowder-Patapsco | |
35064
| MD | Harford | Deer Creek at Stafford Rd, 1.2 mi above mouth of Susquehanna R. & 2.3 mi SE of Darlington | 1965 |
02050306
| Lower Susquehanna | established |
35069
| MD | Harford | Susquehanna River below Conowingo Dam | 1965 |
02050306
| Lower Susquehanna | established |
35074
| MD | Harford | Susquehanna River below Conowingo Dam | 1965 |
02050306
| Lower Susquehanna | established |
1677102
| MD | Montgomery | [No locality description provided] | 2021 |
02060006
| Patuxent | |
35079
| MD | Montgomery | Potomac River, jct Seneca Creek | 1949 |
02070008
| Middle Potomac-Catoctin | collected |
157938
| MD | Washington | Chesapeake and Ohio Canal National Historical Park | 1999 |
02070004
| Conococheague-Opequon | established |